Hi Mark, long time no see, hope the cruise is going well
for dinghies that are dry sailed exterior house paint or better yet porch and deck paint makes way more sense than marine paint because it's formulated for the sort of abuse that a dry sailed dinghy has to endure, seasons of blistering sun with a few hours here and there of being wet, and foot traffic.
I've read that latex is nice when your wood is damp because it's fairly porous so it'll let the moisture out and then dry once the wood is dry.
I've read on Interlux's site that when using brightsides topside paint, "Below the waterline" only applies to boats that will be left in the water for a certain period of time, 2 weeks or more if I recall.
Acrylics and latex paints have come a long way due to environmental concerns over VOCs but I think for boats oil based paints still have the edge, a bit harder, denser, and much less expensive as well, for an alkyd polyurethane one part here it costs about $70/gal, for a water based polyurethane I'm looking at $180/gal and I'd have to put something with uv protection over it, the polyurethane fortified alkyd porch paint I've been using is $25/gal.
The environmental laws here are pretty crazy, mostly due to BC being david suzuki's home stomping grounds, also, about 2/3's of Canada's Flower Children live within 100 miles of where I'm sitting.
Lol, I posted over on Sailing Anarchy when I was looking at a woodstove and someone posted that he wouldn't waste the space and weight it'd take to carry wood and would just use a propane or diesel heater, I got a chuckle out of it, when I back up to a wood heater it feels just like sunshine, haven't run across anything that can compete/compare with wood heat, and I've yet to find propane or diesel laying around on a beach, well, unless you count oil slicks.
I tend to forget that the rest of the world doesn't share Canadians acceptance of Cannabis, recreational weed will be legal here on the 17th, so I edited my post so as not to offend those from more conservative cultures.
The sail in the tutorial I posted doesn't have any rise at all which can be a problem because if the battens don't slope upward from luff to leach (Rise) the battens want to shift forward as they drop into the lazyjacks, "Stagger" is the term I think, I noticed in one of your videos your battens were were moving forward which is why I mentioned it, it's worse when the sail is full of wind, I think your latest version is ok though.
Also, be careful not to stretch your polytarp too tight from luff to leach when you sandwitch it between the batten halves or you'll mess up the camber.
I'd go with less camber, the 6% you mentioned seems a good place to start and if you need more you can always put in a dart or two later, just fold the dart and stitch the bolt-rope together and slap on a couple pieces of duct tape over it :)
You're probably pretty close on the batten sizes, with the system in the tutorial if a batten is too light it's a simple matter just to screw/glue another strip of wood on to stiffen things up, much harder to make them lighter if need be.
I've got Larry Daryl and Daryl rigged to shunt or tack, I mostly shunt as Larry is designed for sculling and has no rocker and sort of a skeg at either end so to tack I have to paddle through the wind although gybing is doable.
The sliding daggerboard works really well in spite of needing some more refinements on the design. The second picture shows the way it is now, when shunting it flops over about a metre so it's more or less balanced on the new shunt, it has to be tied in place as is because it's backwards, once I get the new ama done it'll slide on top of the ama with the board on the lee side instead of under the bench with the board to weather so the lift it develops will hold it in place when shunting, and it'll automatically flop over to balance the boat on the new shunt.
Daryl and Daryl don't have enough flotation between them and are practically awash most of the time which creates a pile of drag that has to be balanced by sliding the daggerboard when tacking and makes weatherhelm pretty brutal when running on either shunt, so the new rig will have to wait till I get the new ama done, but I'm still having enough fun that I'm spending more time sailing than building.
Speaking of which :)
Bill